Earuch F Broacha

US Patent:

7032662, Apr 25, 2006

Filed:

Nov 12, 2003

Appl. No.:

10/706654

Inventors:

Scott Malone - Highlands Ranch CO, US
Earuch Broacha - Tulsa OK, US
Don Shaw - Denver CO, US
Tom Hampton - Houston TX, US

Assignee:

Core Laboratories LP - Houston TX

International Classification:

E21B 43/267
E21B 47/00
G01N 33/24

US Classification:

1662526, 7315242, 1662501, 16625012, 1662802, 507267, 507907, 507924

Abstract:

Disclosed is a method of determining the extent of recovery of materials injected into oil wells or subsurface formations. The method includes injection of one or more tracers into an oil well or into a formation. Included in the method are the steps of introducing a material of interest into the oil well or into the subsurface formation associated with the bore of the oil well; introducing a tracer into the oil well or into the subsurface formation associated with the bore of the oil well; recovering from the oil well a production fluid, analyzing the production fluid for a concentration of the chemical tracer present in the production fluid; and calculating the amount of material of interest recovered from the oil well using the concentration of the chemical tracer present in the production fluid as a basis for the calculation.

US Patent:

20030006036, Jan 9, 2003

Filed:

May 23, 2002

Appl. No.:

10/154130

Inventors:

Scott Malone - Highlands Ranch CO, US
Earuch Broacha - Farmington NM, US
Don Shaw - Denver CO, US
Tom Hampton - Houston TX, US

Assignee:

CORE LABORATORIES GLOBAL N.V. - Willemstad

International Classification:

E21B043/26
E21B047/00
G01N033/24

US Classification:

166/250120, 166/308000, 073/152420, 436/027000, 436/029000

Abstract:

Disclosed is a method of determining the extent of recovery of materials injected into a oil well comprising the steps of: a) preparing a material to be injected into an oil well; b) admixing therewith a chemical tracer compound at a predetermined concentration; c) injecting the admixture into an oil well; d) recovering from the oil well a production fluid; e) analyzing the production fluid for the concentration of the chemical tracer present in the production fluid; and f) calculating the amount of admixture recovered from the oil well using the concentration of the chemical tracer present in the production fluid as a basis for the calculation. Fluorinated benzoic acids are disclosed as a preferred tracer.